Problem with Context Menu

yunier0525

I'm trying to show a contextual menu on a QTreeWidgetItem into a QTreeWidget, but I get the following error "Object::connect: No such slot QTreeWidget::contextMenu(QPoint)"

Here I leave my source code to see if any of you can help me to get off this error.

@#ifndef CUSTOMTREEWIDGET_H
#define CUSTOMTREEWIDGET_H
 
#include <QTreeWidget>
 
class CustomTreeWidget : public QTreeWidget
{
public:
    CustomTreeWidget(QWidget *parent = 0);
    ~CustomTreeWidget();
 
public slots:
    void contextMenu(const QPoint &pos);
};
 
#endif // CUSTOMTREEWIDGET_H
 
#include "customtreewidget.h"
#include "defaulttreeitem.h"
 
/*constructor aqui*/
 
void CustomTreeWidget::contextMenu(const QPoint &pos)
{
    DefaultTreeItem* selected =
            reinterpret_cast<DefaultTreeItem*>(currentItem());
 
    if ( selected != 0 )
        selected->contextMenu(pos);
}
 
 
#ifndef DEFAULTTREEITEM_H
#define DEFAULTTREEITEM_H
 
#include <QTreeWidgetItem>
 
class DefaultTreeItem : public QTreeWidgetItem
{
public:
    explicit DefaultTreeItem(QTreeWidget *view, int type = Type);
    explicit DefaultTreeItem(QTreeWidgetItem *parent, int type = Type);
    ~DefaultTreeItem();
 
    void contextMenu(const QPoint &pos);
};
 
#endif // DEFAULTTREEITEM_H
 
 
#include "defaulttreeitem.h"
#include <QMenu>
#include <QAction>
/*constructor aqui*/
 
void DefaultTreeItem::contextMenu(const QPoint &pos)
{
    // creando el menú contextual
    QMenu* contextMenu = new QMenu();
    QAction *actCustom = new QAction("Custom Action", contextMenu);
    contextMenu->addAction(actCustom);
    contextMenu->exec&#40; pos &#41;;
    delete contextMenu;
}
 
 
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <QMainWindow>
#include <customtreewidget.h>
 
namespace Ui {
    class MainWindow;
}
 
class MainWindow : public QMainWindow
{
    Q_OBJECT
 
public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();
 
private:
    Ui::MainWindow *ui;
    CustomTreeWidget * tree;
 
};
 
#endif // MAINWINDOW_H
 
 
#include "mainwindow.h"
#include "ui_mainwindow.h"
 
MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
 
    this->tree = new CustomTreeWidget(ui->centralWidget);
    this->tree->setContextMenuPolicy(Qt::CustomContextMenu);
 
    connect(this->tree,SIGNAL ( customContextMenuRequested(QPoint) ),
            this->tree,SLOT ( contextMenu(QPoint) ) );
}
 
 
/*....codigo aqui....*/
 
#include <QtGui/QApplication>
#include "mainwindow.h"
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();
 
    return a.exec&#40;&#41;;
}

@

andre

You forgot the Q_OBJECT macro in your header...

koahnig

Also your slot has a different parameter list. Your slot is:
@
void contextMenu(const QPoint &pos);
@
change to:
@
void contextMenu(QPoint pos);
@
since your connect uses:
@
connect(this->tree,SIGNAL ( customContextMenuRequested(QPoint) ),
this->tree,SLOT ( contextMenu(QPoint) ) );
@

andre

The const is ignored by signal/slot anyway, so that should not matter.

yunier0525

thanks, including the macro Q_OBJECT I solved the problem.